IBM 6643, 2179 manual POST error codes

Diagnostic Error Code	FRU/Action
217-28X-XXX	1.	Hard Disk Drive Cable
217-29X-XXX
	2.	Check power supply voltages
Hard Disk Drive (SCSI) error
	3. Hard Disk drive (SCSI)
	4.	SCSI adapter card
	5.	System board
220-000-XXX	1.	No action
Hi-Capacity Cartridge Drive Test Passed
220-XXX-XXX	1.	Remove the Hi-Capacity Cartridge
Hi-Capacity Cartridge Drive error
		Drive and re-test the system
301-XXX-XXX	1.	Keyboard
Keyboard error
	2.	Check and test mouse
	3.	System board
301-000-XXX	1.	No action
Keyboard Test Passed
302-000-XXX	1.	No action
Mouse Test Passed
302-XXX-XXX	1.	Mouse
Mouse error
	2.	Check and test Keyboard
	3.	System board
303-000-XXX	1.	No action
Joystick Test Passed
303-XXX-XXX	1.	Remove the Joystick and re-test the
Joystick error
		system
305-000-XXX	1.	No action
Monitor DDC Test Passed
305-250-XXX	1.	Run Setup to enable DDC
Monitor DDC self test failure
	2.	Cable
	3.	Monitor
	4.	Video card
	5.	System board
415-000-XXX	1.	No action
Modem Test Passed
415-XXX-XXX	1.	Remove the Modem and re-test the
Modem error
		system

POST error codes

Each time you power-on the system, it performs a series of tests that check the operation of the system and some options. This series of tests is called the Power-OnSelf-Test, or POST. POST does the following operations:

vChecks some basic system-board operations

vChecks the memory operation

vStarts the video operation

vVerifies that the diskette drive is working

vVerifies that the hard disk drive is working

54Hardware Maintenance Manual